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Biocatalytic cascades driven by enzymes encapsulated in metal-organic framework nanoparticles
2018/8/15 12:50:31

Dear XFNANO customers:

Recently ,we found an excellent paper and we would like to share with you .

The paper calledBiocatalytic cascades driven by enzymes encapsulated in metal-organic framework nanoparticles which was written by the research team of Itamar Willner from Hebrew University of Jerusalem.

Biocatalytic transformations in cells, such as enzyme cascades, involve complex networks proceeding in spatially confined microenvironments. Here, inspired by nature, they demonstrated effective biocatalytic cascades by the encapsulation of two or three enzymes, or enzyme/cofactor components, in zeolitic imidazolate framework-8 metal–organic framework nanoparticles (ZIF8-NMOFs) that act as nanoreactors. 

Figure 1. Double enzyme cascade system is integrated in ZIF-8

The integration of the two-enzyme system (glucose oxidase and horseradish peroxidase) or three-enzyme system (β-galactosidase, glucose oxidase and horseradish peroxidase) in the NMOFs leads to 7.5-fold and 5.3-fold enhancements in the activity of the catalytic cascades, respectively, compared with the bulk mixture of the catalysts in solution.

In addition, the encapsulation of alcohol dehydrogenase, NAD+–polymer and lactate dehydrogenase in the NMOFs yields a coupled biocatalytic cascade involving coupled NAD+-dependent enzymes, leading to the catalytic reduction of pyruvic acid to lactic acid by ethanol.

Figure 2. Integrated tri-enzyme cascade system in ZIF-8

Figure 3. Enzyme bicatalyzed cascade reaction determined by Cofactors in NAD+ auxiliary ZIF-8 

Figure 4. Bienzyme bicatalyzed cascade reaction in NAD+ assisted ZIF-8

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